Happy Birthday Twitter

According to Wikipedia, the first tweets were published on March 21, 2006, exactly 4 years ago. Happy Birthday Twitter.

Jack Dorsey published the first Twitter message at 9:50 PM Pacific Standard Time (PST), March 21, 2006: "just setting up my twttr".

This post was followed by Biz Stone with his first post at 12:51 PM: "just setting up my twttr"

And the rest is history.